Middle-finger reflex

Tan U.

INTERNATIONAL JOURNAL OF NEUROSCIENCE, cilt.116, ss.541-545, 2006 (SCI İndekslerine Giren Dergi) identifier identifier identifier

  • Cilt numarası: 116 Konu: 5
  • Basım Tarihi: 2006
  • Doi Numarası: 10.1080/00207450500403306
  • Sayfa Sayısı: ss.541-545


A new reflex is described: middle- finger extensor reflex elicited by percussion of tendon insertion of musculus extensor digitorum communis in forearm. Following percussion using a reflex hammer, two EMG responses from the belly of the muscle were recorded: a short latency monosynaptic reflex with a latency of 31.4 +/- 1.5 ms ( M1), and a long- latency middle- finger reflex with a mean latency of 64.8 +/- 6.31 ms ( M2), the former being a monosynaptic extensor reflex, and the latter belonging to a spino- cortico- spinal reflex circuitry. It was suggested that the middle- finger extensor reflex elicited by radial nerve afferents and efferents ( C7 - C8) would be of clinical and theoretical importance.